답안 #947273

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
947273	2024-03-15T20:40:39 Z	NValchanov	Boat (APIO16_boat)	C++17	9 / 100	2000 ms	370604 KB

boat

#include<bits/stdc++.h>

#define endl '\n'
#define a first
#define b second

using namespace std;

typedef long long ll;

const int MAXN = 500 + 10;
const int MAXA = 1e6 + 10;
const int MOD = 1e9 + 7;

int n,cnt;
int a[MAXN];
int b[MAXN];
int dp[MAXA];
int pref[MAXA];
unordered_map <int,int> pos;

void read()
{
    cin >> n;
    for(int i = 1; i <= n; i++)
    {
        cin >> a[i] >> b[i];
    }
    a[0] = b[0] = -1;
}

void fill_pos()
{
    set <int> st;

    for(int i = 1; i <= n; i++)
    {
        int from = a[i];
        int to = b[i];

        for(int j = from; j <= to; j++)
        {
            st.insert(j);
        }
    }

    int last = -1;

    for(int cur : st)
    {
        if(cur == last)
            continue;

        pos[cur] = ++cnt;
        last = cur;
    }
    /**
    for(auto x : pos)
    {
        cout << x.first << " " << x.second << endl;
    }
    */
}

void fill_dp()
{
    for(int i = 1; i <= n; i++)
    {
        int from = pos[a[i]];
        int to = pos[b[i]];
        for(int j = to; j >= from; j--)
        {
            dp[j] = (dp[j] + pref[j - 1] + 1 /** za nulata **/) % MOD;
        }
        for(int j = from; j <= cnt; j++)
        {
            pref[j] = (pref[j - 1] + dp[j]) % MOD;
        }
    }
}

int main()
{
	ios_base::sync_with_stdio(false);
	cin.tie(nullptr);
	cout.tie(nullptr);

    read();
    fill_pos();
    fill_dp();

    cout << pref[cnt] << endl;

	return 0;
}

Subtask #1

9.0 / 9.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	344 KB	Output is correct
2	Correct	1 ms	348 KB	Output is correct
3	Correct	1 ms	348 KB	Output is correct
4	Correct	1 ms	344 KB	Output is correct
5	Correct	2 ms	348 KB	Output is correct
6	Correct	1 ms	348 KB	Output is correct
7	Correct	1 ms	348 KB	Output is correct
8	Correct	1 ms	348 KB	Output is correct
9	Correct	1 ms	348 KB	Output is correct
10	Correct	1 ms	348 KB	Output is correct
11	Correct	1 ms	348 KB	Output is correct
12	Correct	1 ms	348 KB	Output is correct
13	Correct	1 ms	348 KB	Output is correct
14	Correct	1 ms	348 KB	Output is correct
15	Correct	1 ms	348 KB	Output is correct
16	Correct	1 ms	348 KB	Output is correct
17	Correct	1 ms	348 KB	Output is correct
18	Correct	1 ms	348 KB	Output is correct
19	Correct	1 ms	348 KB	Output is correct
20	Correct	1 ms	348 KB	Output is correct

Subtask #2

0 / 22.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	344 KB	Output is correct
2	Correct	1 ms	348 KB	Output is correct
3	Correct	1 ms	348 KB	Output is correct
4	Correct	1 ms	344 KB	Output is correct
5	Correct	2 ms	348 KB	Output is correct
6	Correct	1 ms	348 KB	Output is correct
7	Correct	1 ms	348 KB	Output is correct
8	Correct	1 ms	348 KB	Output is correct
9	Correct	1 ms	348 KB	Output is correct
10	Correct	1 ms	348 KB	Output is correct
11	Correct	1 ms	348 KB	Output is correct
12	Correct	1 ms	348 KB	Output is correct
13	Correct	1 ms	348 KB	Output is correct
14	Correct	1 ms	348 KB	Output is correct
15	Correct	1 ms	348 KB	Output is correct
16	Correct	1 ms	348 KB	Output is correct
17	Correct	1 ms	348 KB	Output is correct
18	Correct	1 ms	348 KB	Output is correct
19	Correct	1 ms	348 KB	Output is correct
20	Correct	1 ms	348 KB	Output is correct
21	Correct	31 ms	1368 KB	Output is correct
22	Correct	28 ms	860 KB	Output is correct
23	Correct	27 ms	860 KB	Output is correct
24	Correct	29 ms	856 KB	Output is correct
25	Correct	28 ms	1016 KB	Output is correct
26	Correct	27 ms	604 KB	Output is correct
27	Correct	27 ms	604 KB	Output is correct
28	Correct	27 ms	604 KB	Output is correct
29	Correct	30 ms	600 KB	Output is correct
30	Execution timed out	2065 ms	96368 KB	Time limit exceeded
31	Halted	0 ms	0 KB	-

Subtask #3

0 / 27.0

#	결과	실행 시간	메모리	Grader output
1	Execution timed out	2097 ms	370604 KB	Time limit exceeded
2	Halted	0 ms	0 KB	-

Subtask #4

0 / 42.0

#	결과	실행 시간	메모리	Grader output
1	Correct	1 ms	344 KB	Output is correct
2	Correct	1 ms	348 KB	Output is correct
3	Correct	1 ms	348 KB	Output is correct
4	Correct	1 ms	344 KB	Output is correct
5	Correct	2 ms	348 KB	Output is correct
6	Correct	1 ms	348 KB	Output is correct
7	Correct	1 ms	348 KB	Output is correct
8	Correct	1 ms	348 KB	Output is correct
9	Correct	1 ms	348 KB	Output is correct
10	Correct	1 ms	348 KB	Output is correct
11	Correct	1 ms	348 KB	Output is correct
12	Correct	1 ms	348 KB	Output is correct
13	Correct	1 ms	348 KB	Output is correct
14	Correct	1 ms	348 KB	Output is correct
15	Correct	1 ms	348 KB	Output is correct
16	Correct	1 ms	348 KB	Output is correct
17	Correct	1 ms	348 KB	Output is correct
18	Correct	1 ms	348 KB	Output is correct
19	Correct	1 ms	348 KB	Output is correct
20	Correct	1 ms	348 KB	Output is correct
21	Correct	31 ms	1368 KB	Output is correct
22	Correct	28 ms	860 KB	Output is correct
23	Correct	27 ms	860 KB	Output is correct
24	Correct	29 ms	856 KB	Output is correct
25	Correct	28 ms	1016 KB	Output is correct
26	Correct	27 ms	604 KB	Output is correct
27	Correct	27 ms	604 KB	Output is correct
28	Correct	27 ms	604 KB	Output is correct
29	Correct	30 ms	600 KB	Output is correct
30	Execution timed out	2065 ms	96368 KB	Time limit exceeded
31	Halted	0 ms	0 KB	-